Astrofísicas: Manchas solares

  • Publicación
    Properties of sunspots in cycle 23. I. Dependence of brightness on sunspot size and cycle phase
    Aims:In this paper we investigate the dependence of umbral core brightness, as well as the mean umbral and penumbral brightness on the phase of the solar cycle...
  • Publicación
    Properties of the Umbral Filament Observed in Active Region NOAA 12529
    Recent observations of the solar photosphere revealed the presence of elongated filamentary bright structures inside sunspot umbrae, called umbral filaments...
  • Charla
    Radiative MHD simulations of sunspot structure
    For a long time radiative MHD simulations of entire sunspots from first principles were out of reach due to insufficient computing resources. Over the past 4...
  • Publicación
    Returning magnetic flux in sunspot penumbrae
    Aims: We study the presence of reversed polarity magnetic flux in sunspot penumbra. Methods: We applied a new regularized method to deconvolve...
  • Publicación
    Search for torsional oscillations in isolated sunspots
    In this work we seek evidence for global torsional oscillations in alpha sunspots. We have used long time series of continuum intensity and magnetic field...
  • Publicación
    Signatures of Magnetic Reconnection at the Footpoints of Fan-shaped Jets on a Light Bridge Driven by Photospheric Convective Motions
    Dynamical jets are generally found on light bridges (LBs), which are key to studying sunspot decay. So far, their formation mechanism is not fully understood...
  • Publicación
    Signatures of the impact of flare-ejected plasma on the photosphere of a sunspot light bridge
    Aims: We investigate the properties of a sunspot light bridge, focusing on the changes produced by the impact of a plasma blob ejected from a C-class flare...
  • Publicación
    Size matters
    The new generation of ground-based, large-aperture solar telescopes promises to significantly increase our capabilities to understand the many basic phenomena...
  • Publicación
    Small-scale magnetic flux emergence in a sunspot light bridge
    Context. Light bridges are convective intrusions in sunspots that often show enhanced chromospheric activity. Aims: We seek to determine the nature of flux...